| 13762 | |
| 13763 | // convert string to array (typed, when possible) |
| 13764 | var string2buf = function (str) { |
| 13765 | var buf, c, c2, m_pos, i, str_len = str.length, buf_len = 0; |
| 13766 | |
| 13767 | // count binary size |
| 13768 | for (m_pos = 0; m_pos < str_len; m_pos++) { |
| 13769 | c = str.charCodeAt(m_pos); |
| 13770 | if ((c & 0xfc00) === 0xd800 && (m_pos+1 < str_len)) { |
| 13771 | c2 = str.charCodeAt(m_pos+1); |
| 13772 | if ((c2 & 0xfc00) === 0xdc00) { |
| 13773 | c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00); |
| 13774 | m_pos++; |
| 13775 | } |
| 13776 | } |
| 13777 | buf_len += c < 0x80 ? 1 : c < 0x800 ? 2 : c < 0x10000 ? 3 : 4; |
| 13778 | } |
| 13779 | |
| 13780 | // allocate buffer |
| 13781 | if (support.uint8array) { |
| 13782 | buf = new Uint8Array(buf_len); |
| 13783 | } else { |
| 13784 | buf = new Array(buf_len); |
| 13785 | } |
| 13786 | |
| 13787 | // convert |
| 13788 | for (i=0, m_pos = 0; i < buf_len; m_pos++) { |
| 13789 | c = str.charCodeAt(m_pos); |
| 13790 | if ((c & 0xfc00) === 0xd800 && (m_pos+1 < str_len)) { |
| 13791 | c2 = str.charCodeAt(m_pos+1); |
| 13792 | if ((c2 & 0xfc00) === 0xdc00) { |
| 13793 | c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00); |
| 13794 | m_pos++; |
| 13795 | } |
| 13796 | } |
| 13797 | if (c < 0x80) { |
| 13798 | /* one byte */ |
| 13799 | buf[i++] = c; |
| 13800 | } else if (c < 0x800) { |
| 13801 | /* two bytes */ |
| 13802 | buf[i++] = 0xC0 | (c >>> 6); |
| 13803 | buf[i++] = 0x80 | (c & 0x3f); |
| 13804 | } else if (c < 0x10000) { |
| 13805 | /* three bytes */ |
| 13806 | buf[i++] = 0xE0 | (c >>> 12); |
| 13807 | buf[i++] = 0x80 | (c >>> 6 & 0x3f); |
| 13808 | buf[i++] = 0x80 | (c & 0x3f); |
| 13809 | } else { |
| 13810 | /* four bytes */ |
| 13811 | buf[i++] = 0xf0 | (c >>> 18); |
| 13812 | buf[i++] = 0x80 | (c >>> 12 & 0x3f); |
| 13813 | buf[i++] = 0x80 | (c >>> 6 & 0x3f); |
| 13814 | buf[i++] = 0x80 | (c & 0x3f); |
| 13815 | } |
| 13816 | } |
| 13817 | |
| 13818 | return buf; |
| 13819 | }; |
| 13820 | |
| 13821 | // Calculate max possible position in utf8 buffer, |